It's not that he doesn't have the more comfortable armor! He just got gussied up to meet the Grand Enchanter, as one does. Not that he'll say no to another set, just for her.

Cade seems to glow in her appreciation, looking for all the world like a person who isn't perpetually wracked by nerves and self-doubt. "My lady," he says quietly, in acknowledgment. "I am privileged to be worthy of your regard."